I often think it can often be very difficult for comedians to revisit the same gag. I think Russell's a bit more than a comedian.

I have a kind of neutrality, physically, which has helped me. I have a face that can be made to look a lot better - or a lot worse.

Almost every comedy you see is about people making all wrong choices and making all the errors of judgement possible. Good comedy is when it works on this scale. Because it is psychologically very real.

It's a funny thing - the reality is I have no feelings about school. It's long gone. Funnily enough, the bad memories - of which I don't have any left to be honest, I can just remember a sense of tedium - have faded. And teachers that I liked have remained quite vivid. There are three or four left.

It's whether they have a vision and whether they're able to communicate it. The best director is just someone who gets over-excited about doing it - they don't even have to know much about camera or acting.

I'd love to try my hand at something else.

If I'd loved my chemistry teacher and my maths teacher, goodness knows what direction my life might have gone in. I remember there was a primary school teacher who really woke me up to the joys of school for about one year when I was ten. He made me interested in things I would otherwise not have been interested in - because he was a brilliant teacher. He was instrumental in making me think learning was quite exciting.